¿Qué está pasando allá arriba?

Three happy frogs jump on the roof of a house when they realize that down a pig tries to imitate them. How is it possible that he intends to jump as high as they? They decide to teach the little pig a lesson: «Jumphigh!» the first frog says; «Jump higher!» goes the second one; and «Now higher!» says the third one. But then, the pig disappears. Where could he be?